K-Stew's latest role is very raunchy

Kristen Stewart is set to bare all in new film On The Road.

In a series of new stills from the movie, the actress shows off her nipples and naked bottom as she lies undressed on a bed.

Kristen, 22, also reveals her breasts while she sits in the back of a car driven by co-star Garrett Hedlund.

The Twilight star plays teenager Marylou in the adaptation of Jack Kerouac‘s cult 1957 novel, which is released next week.

Kristen had no problem stripping off in front of the film’s crew in order to shoot the saucy scenes.

‘It didn’t bother me,’ she told MTV.

‘You can do no wrong with [director Walter Salles]. He puts so much inside of you.’

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Anna Duff